Release 3 of the Oracle Unbreakable Enterprise Kernel for Linux is supported in this release of the server software. Release 3 is installed by default on Oracle Linux 6.5, 6.6, and 7 OS and can be installed on Red Hat Enterprise Linux 6.5, 6.6, and 7 OS. Release 3 is based on the 3.8.x mainline Linux kernel and contains improvements and new features that have been incorporated into mainline Linux since Release 2 of the kernel.
Oracle Unbreakable Enterprise Kernel Release 3 for Linux: For the latest information about operating system compatibility and pointers to installation information, refer to Oracle Unbreakable Enterprise Kernel Release 3 Release Notes at:
http://oss.oracle.com/ol6/docs/RELEASE-NOTES-UEK3-en.html#ol_instav